Fig. 1. 
Fig. 1. 
Fig. 1. 
LIST OF PLATES. 727 
Prats XXIII. 
Amblycephalus monticola, Cantor, p. 443. 
. Leptognathus andiana, Blgr., p. 452. 
elegans, Blgr., P.. 452. 
Upper and side views of head and anterior part of 
body, lower view of head, and enlarged view of 
dorsal scales in the middle of the body. 
Prats XXIV. 
Leptognathus leucomelas, Blgr., p. 453. 
ventrimaculata, Bligr., p. 454. . 
Upper, lower, and side views of head and anterior part 
of body. 
Prats XXV. 
Echis coloratus, Gthr., p. 507. Upper and side views 
of head and anterior part of body. 
. Lachesis okinavensis, Blgr., p. 549. Upper and side views 
of head and anterior part of body. 
— flavomaculatus, Gray, p. 556. Upper and side 
views of head. 
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